Wounds are injuries to the skin and other soft tissues caused by trauma, a surgical incision or prolonged pressure. Bed sores (also known as decubitus ulcers or pressure ulcers) occur on areas of the skin that are under pressure causing the blood supply to be reduced when a person is bedridden or unable to sense pain. The capacity of a wound to heal
depends in part on its depth, as well as on the overall health and nutritional status of the individual.